Added StructuredAnswer policy & authorization

First version of the Partners creation & edit form

First working version of the new Plan details form

Updated fragment models according to data model

Multiple changes to Project & Meta fragments are saved ...

Persons fragments should be created only when they don't exist

STI column value should be more readable

Update fragments models with new table columns

Updated fragments models comments

Implemented JSON fragments models methods according to the class model

(WIP) Implemented structured schema into rails models